USB840F/M/X BLE 5, Thread, Zigbee Dongles
Ver 1.00 May 2019
1. Hardware Description
USB840F/X Hardware Description
USB840F and USB840X use the same enclosure and host PCB. LED1 (red color) and LED2 (blue color) are not
silkscreened on enclosure. Operation voltage of blue LED is higher than 1.8V DC output voltage of nRF52840 after
chiperase
. You must set DC output to 3V before using the blue LED.
You need to open USB840F/X enclosure to access bootloader button to load application program. Or, to
reprogram dongle with your own bootloader and private key after
chiperase
.
USB840F/X Schematics
Schematics of USB840F and USB840X is below.
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